Hi. I do think this may be your George. He is mentioned in the History of the Pacific Northwest in 1850 as described below. He is also identified as George L. Snelling in five letters written to Oregon Territorial Governor/Congress/Senator Joseph Lane between May 13, 1854 and January 29, 1856 so it appears he stuck around for a while anyway. The letters are at the Oregon Historical Society here in Portland. Here's what I have right now and I'll see what else I can dig up.
"The Kate Heath sailed from San Francisco on the 12th of September, 1850, and entered the Umpqua safely after a quick passage. After crossing the bay, they were surprised to find the wreck of a vessel which proved to be the ship Bostonian. This ship had been dispatched by a Boston merchant by the name of Gardiner with a cargo of merchandise, around Cape Horn, under the charge of George Snelling, a nephew of Gardiner, as supercargo, as an adventure on the northwest coast. Snelling having heard of the new discovery entered the Umpqua, but having missed the channel was wrecked upon a sand spit. The crew managed to save most of the cargo, which wa taken to a place of safety and covered by the sails of the wrecked vessel. This spot was named Gardiner, and has ever since been a place of importance as a seaport."